Method of and die for forging cutting-pliers



(No Model.) 2 Sheets-Sheet 1. J. G. BALZER.

METHOD. OF AND DIES FOR EORGING CUTTING PLIERS.

No. 283,468. Patented Aug. 21, 1883.

2 Sheets-shat (NeModeL) I J.G.BALZBR. I METHOD OP'AND DIES FOR FORGING CUTTING PLIERS. No. 283,458. Patented Au 21,- .1883.

0 1 x l I I E UNITED STATES METHOD OF AND DIE FOR FORGING C UTTING-PLIERS.

PATENT OFFICE.

JOHN C. BALZER, OF SOUTHINGTON, CONNECTICUT.

SPECIFICATION forming part ofv Letters Patent No. 283,458, dated August 21, 1883.

Application filed October 30, 1882. (No model.)

To all whom it may concern:

new and useful Improvements in Methods of and Dies for Forging Cutting-Pliers, of which the following is a specification.

My invention relates to improvements in methods of and dies for forging cutting-pliers mainly by means of swaging and trimming dies, as hereinafter described.

In the accompanying drawings, Figure l is a plan view of my lower die-block and swaging-dies. Fig. 2 is a like view, showing the under face of the companion die-block and dies. line a: a: of Fig. 1. Fig. 4 is avertical section of the same on line 7 y of Fig. 1. Fig. 5 is a plan view of the blank as produced by the die A. Fig. 6 is a side elevation of the same. Fig. 7 is a plan view of the blank as produced by the die C, and Fig. 8 is a side elevation of the same.

My invention relates toforming the head of that part of cutting-pliers which has an eye in the vicinity of the joint, and through which eye the companion part extends.

The dividing-line of the dieA is first horizontal from the rear edge of the die forward, and then curved substantially on thearc of a circle, the curve extending down into the lower die-block, as at a a, Fig. 1, while the lower face of the upper die-block extends downwardly ina corresponding manner, as at bb, Fig. 2. A shallow and wide recess, 0, is sunk int-he lower half of the die A, for forming a rudimentary cutting-lip, and a deeper recess, (1, to' form the body of the head, in connection with a like recess, (1, formed in the upper half of said die A. In the recesses (Z d projections c e are placed to form the eye. The dividing-line of the dies 13 and C is first horizontal from the rear edge of the die forward, then slanting upward and downward again, somewhat inthe form of an inverted-V, and then slightly inclining upward again. They are both provided with a recess, for forming the cutting lip; but instead of being in a horizontal position, as in the die A, it is in substantially a vertical position, and it is in the upper instead of the lower part. The recesses h h for Fig. 3 is a vertical section of my dies on forming the body of the head, are substantially like the recesses (Z d of die A, except that they more nearly approach the form and proportion of a finished head. The die B has the eye projections k k, while the die C has only one eye-projection, m, of greater height, and passing into a depression, in, in the upper half. A bar of metal is brought ,to the proper heat and is struck by the die A, thereby producing the blank shown in Figs. 5 and 6, lcaving a projecting fin, n, at the edge, and a dia phragm, 0, in the eye. The rudimentary cut ting-lip q, Fig. 6, is indicated by broken lines in Fig. The diaphragm 0 and fin 'n are next removed by means of trimming-dies of blank with the steel on is then brought to a proper heat and struck in the die B, and then in the die C, thereby producing the form shown in Figs. 7 and 8. It is then again trimmed, after which it is ready for finishing in any ordinary manner, and to have the eye spread open for the insertion, of the companion part.

I claim as my invention- 1. That improvement in the art of forging cutting-pliers which consists of swaging the stock into the form shown in Figs. 5 and 6, removing the surplus metal therefrom, welding a steel plate to the rudimentary lip, and then swaging into the form shown in Figs. 7 and 8, substantially as described.

2. The cutting-plier-blank die A, having the horizontal recess for forming the cuttinglip, the recesses for iorming the body of the blank-head, and the eye-forming projections in said recesses, substantially as described, and for the purpose specified.

3. The series of dies A B C, for the progressive formation of cutting-plier blanks, substantially as described, and for the purpose specified.

JOHN C. BALZER. 

